Gluing machine



May 9, 1950 c. F. SCHAEFER GLUING MACHINE 5 Sheets-Sheet 1 Filed March 28, 19.47

INVENTOR (HA /MES F SCAWEFE 7 -7 ATT RNEY C. F. SCHAEFER GLUING MACHINE 5 Shets-Sheet 2 FIG. 2

lNVENTOR C/mm/ss E CHflEFER May 9, 1950 Filed March 28, 1947 May 9, 1950 c. F. SCHAEFER 2,506,550

GLUING MACHINE Filed March 28,- 1947 3 Sheets-Sheet 55 INVENTOR Patented May 9, 1950 UNITED STATES PATENT OFFICE GLUING MACHINE Charles F. Schaefer, Norwalk, Conn.

Application March 28, 1947, Serial No. 737,939

10 Claims. '1

This invention relates to improvements in gluing machines and is particularly directed to machines for applying adhesive to one face of sheets of material.

One of the objects of the present invention resides in the provision of a machine of the character indicated wherein the various parts are readily adjustable for proper assembling and which can readily be disassembled.

Another object resides in the provision of simple and readilyoperable means for varying the contact or distance between the rollers for roller control adjustment.

Another object resides in the arrangement of the operating mechanism relative to the glue tank, whereby, upon removal of the cover plate of the machine, a large portion of the glue tank is exposed to permit filling of the tank Without removing the tank and without disturbing any of the operating mechanism.

Another object of the present invention resides in the provision of resilient means for maintaining parts of the machine in proper operating positions; and the provision of means whereby the tension of the resilient means can readily be adjusted.

Another object resides in the provision of means whereby certain of the rollers can readily be moved out of position for inspection and cleaning of the machine and to permit removal of the tank roller for cleaning or replacement, without disturbing the setting or adjustment of any of the parts.

A further object resides in the spacing of the rollers relative to their bearings, and the provision of scraper means in the spaces for removing glue from the ends of the rollers and directing the same to the glue tank, thereby preventing the glue from contacting the roller shafts and bearings.

A further object is the provision of readily removable strippers having means associated there-- with to prevent their being thrown out of operating position. I

A still further object of the invention resides in the provision of a machine of the character indicated which is adapted to apply glue to sheets of material of various sizes, and wherein provision is made to prevent the transfer of glue from the gluing roller to the feed roller, regardless of the size of the sheet being glued.

Other and further objects of the present invention will be manifest from the following description and the accompanying drawings; in which drawings: i

Fig. 1 is a side view of the machine with one side wall removed;

Fig. 2 is a fragmentary view thereof with the top wall or cover plate removed; Fig. 3 is a side view taken substantially on line 33 of Fig. 2; and

Fig. 4 is a side view taken substantially on line 4-4 of Fig. 2.

Referring to the drawings in detail, a casing ID for the machine comprising, top, bottom, side and end walls is supported on legs I2, as will be seen from Fig. 1. A motor I4 for driving the machine is mounted on the bottom wall of the casing, and has a pulley I6 over which a drive belt l8 passes, which belt in turn passes over a large pulley 20 on the shaft 22 carrying a pinion 24 adapted to mesh with a gear 26 mounted on a tank roll-er shaft 28.

The tank roller shaft 28 is mounted in bearings 30 (Fig. 1) on a support 32, one end of which support is carried on standards 34 and the other end by one end wall 36 of the casing or machine housing; The bearings 30 are open bearings and are adjustable lengthwise of the machine in slots 38 and 40 through which pass anchoring bolts 42 and 44, respectively. The purpose and advantage of the adjustability of these bearings will be pointed out hereinafter. The support 32 also removably supports an adhesive tank 46.

0 The support 32 has a bracket 48 pivotally secured thereto at 50. This bracket, as will be seen from Fig. 2, comprises a pair ofv arms which carry adjustable bearings 52 at their free ends for feed roller shaft 54, and glue roller shaft 56, which bearings are provided with slots 58, whereby the same may be moved for adjustment longitudinally of the bracket, and secured in adjusted position by screws 60.

The tank roller shaft 28 carries a tank roller 40 62 which is partly immersed in adhesive in the tank 46, and has a gear 64 at the end opposite the end which carries the gear 26. The gear. 64 meshes with pinion 66 on the glue roller shaft 56, which shaft carries a lue roller 68 adapted to receive adhesive from the tank roller '52. The pinion 66 in turn is in mesh with a gear on the feed roller shaft 54, which shaft carries a feed roller 12.

As will be seen from Fig. 2, the tank roller 62 and the glue roller 68 are shorter than the width of the tank 46, whereby their ends are spaced from their bearings and are within the confines of the sidewalls of the tank. A pair of scrapers 69 are provided at the ends of the glue and tank 55 rollers and in contact therewith, whereby to scrape glue from the ends of the rollers and return the same to the glue tank, thereby preventing the same from contacting the roller shafts and bearings. These scrapers are'adjustably mounted on stub shafts 61 (Fig. 1) secured in the bracket 48 and are adapted to be secured in adjusted position relative to the ends of the glue and tank rollers by a set screw H, as shown 7 in Fig. 1.

From the foregoing: it will be seen that the pivoted bracket 48'carries the feed roller 12 and its shaft and bearings, as Well as the glue roller 68 and its shaft and bearings.

its open bearings. As will be seen from Fig. 1, each of the lugs 88 is in the form of a bell crank pivotally mounted on a'screw 89, and having a projecting portion. 91 forming a handle. The

springs 90 are connected to the lower end of the lug, so that upon, loosening the screw 89, the lug can be rotated on the screw in either clockwise or counterclockwise direction to increase or decrease the tension on the spring.

When assembling the machine, the tank 46 is set in position onrthe support 32' and the tank This bracket can:

be rotated on its pivot substantially 189 mm its normal position, and when so rotated, the

glue tank and tank roller are exposed; permitting access thereto,whereby the glue: tankcanbe. rc-:-

moved for cleaning, and the tank roller and its 7 shaft can readily be lifted out of the operrbear matically be moved away frompthe tank rollert to accommodate and permit the passage of: the same Without injury to any of the parts: or the; machine, and the bracket. willf be; IEtllfinfid: to normal positionby; yielding means hereinafter described" The free end of thewbracket 48 ren-11ote:-.fronrits pivotal point, is provided with an adjustingw screw T4 which rests on an: eccentricallymoun ed adjusting" member or dial "5" provided" with a handle or pointer 18. As will be seenfrom 1; the dial 16 is mounted'on a shaft 1-3 carried by the support 32; .When the dial isrotatedin one direction, the free end of' the bracket is raised about its pivotal point; and when rotated in the opposite direction is lowered. The raisingand" lowering of the bracket will adjust'the pe'-- sition of the glue roller with respect tothetank roller whereby the proper thickness or film of adhesive is transferred from the tank roller to V the glue roller.

The bracket also carries a shaft 80' in open bearings 82 for a plurality of strippers 86 ad justable along the shaft. adapted to lie in contactv with; the upper sur face of the glue roller 68, whereby the strip sheets of paper from the glue roller as the same are fed through the machine. These strippers each have. a'projecting. eccentrically mounted weighted member 85 whichserves to retain the strippers in' contact with the gl'ue roller; and which is adapted to engage the under surface. of the glue. roller, in the event the strippers are accideritly rocked; about the shaft 80, wherebytov prevent the strippers and the shaft'bei'ng'knocked out of the open bearings, or out of operating position.

These strippers are A lug. as. is provided at each side or the see end of the bracket to receive a spring 90, the other end of which is securedft'o' a pin 92'- These springs serve to hold the bracket in position whereby the glue roller 56 will be positioned properly relative to the tank roller 28, and will yield in the event any foreign. matter, larger 7 than the thickness of the desired film of ad'- hesi've, passes between the rollers. If desired they will se'rve to maintainthe bracket positio as'well as to retainthe stripper shaft in rol1er762' set in position with the ends of its shaft 28 in the open bearings 30, and the bearings; adjusted whereby the gear 26 will be in proper mesh with the driving pinions 24; after which the bearings are secured in their adjusted position: by the bolts- 42 and 44. The feed roller 12 and theglue roller 68 are mounted in their bearings 52 on the bracket 38. The bracket 48 is then lowered about its. pivot and the bearin 52: adjusted: to. bring: the pinion into: Dnoper mesh with the gear: 6.4:, and. the; glue; roller: 58;. into proper position relativeito: thetankzroll'er 62, after which the bearings 52 are seeurediin" adjusted position. 7

When the: machine" has: been. assembled-,1 in, the;

manner described, the top: wall orcoverplate is placed in position. The; fiat. surface: of. this cover plate terminates short. ofthe feed;- roller. 12 and serves'as a feedtablei forsheets. of; ma-

terial 1 3 fed to the. machine, as: shown, in.v dot and dash line in. Fig. 1;. to: receivea coatingof.

adhesive. The motor switch maythen. bethrown to close thecircuit to. the. motor. IA; togdrive; the bel'tlB', pulley 20 pinionrzflg gear 26.;tank: rollershaft. 28; and the 'tankgroller' 62,. whereby ad'- hesive is picked up by the. latter: roller: and transferredto the glue roller 68; The glue'roll'er which is driven through the gear M on shaft. 28- and the pinion 66; transfersthe adhesive 130117118 sheet of material which is fed between the glue roller and the feed roller, the latter roller beingdriven by the pinion H1 which is in. mesh: with.

the pinion 66. As the sheet ofmaterial passes between'the glue roller and feed roller, it is" removed by the strippers 84. .Only two strippers: are-shown in the drawing for clarity of illustration, it being understood 'that any desired number of' such strippers may be employed; and may be moved along the shaft to'any desired position.

'As will be seen from the 'foregoin'g the coatingcontrol adjustment includes the adjusting. screw 14 for rough adjustmentof the space between theglue roller and the tank roller; and the dial H5 for finer or vernier adjustment. 'The adjusting screw 14; when rotated-inaclockwise direction will engage the periphery' of' thedial 16 and cause the bracket 48' to'mqveabout its pivot is rotated in the opposite direction the spring will. cause the bracket to move about its pivot in the direction to bring the "glue roller closer to:

f the tank roller. When the approximate desired 7 the upper. end of the springs 90 may be hooked over the ends of the stripper shaft 89 whereby adjustment made in: the manner described, 7 should it then be: desired to vary the thickness of the film of adhesive tobe. applied to the sheet of material, it is merely necessary to' rotate the dial 1G in the, desired direction, whereby to adjustthe glue roller relative tlo the tank roller to ac;- complish the desired variation of the roller coating control. 7

This roller coating control has mam-ea;

vantages over scrapers as used in prior machines for controlling the coating, in that in the machine of the present invention lumps of glue are pulverized between the rollers, or pass between the rollers in the manner hereinbefore described, thereby avoiding streaky, uneven glued sheets, such as often result from the use of scrapers in prior machines by reason of the scrapers catching lumps of glue and retaining them in contact with the sheet being glued.

When it is desired to fill the tank, or remove it for cleaning, it is merely necessary to remove the top wall or cover plate. When it is desired to remove or to clean the tank roller, it is merely necessary to raise the bracket 48, in the manner previously described, whereby the tank roller is exposed, and being removably mounted, can readily be taken out of the machine.

It will be seen from Fi 1, that there is ample clearance between the gluing roller and the feed roller so that no glue is transferred to the feed roller. It will also be seen that any sheet of material, of a width equal to or less than the length of the gluing roller, and of any desired length, can be coated by the machine of the present invention. Also that sheets or strips of material whether square, oblong, round, oval or any other shape can be efficiently coated.

It will be appreciated from the foregoing that the present invention provides a machine of the character indicated, which is compact, and readily adjustable; which is capable of efiiciently carrying out all of the objects mentioned at the beginning of the specification; and which is capable of coating sheets of any desired material, such as paper, cardboard, leather, leatherette, cloth; and wherein any desired thickness of film of adhesive, within the limits of the machine can be applied to such sheets.

While I have illustrated and described a single feed roller, it is to be understood that more than one such roller may be employed. In fact when employing the machine to coat materials such as cardboard, for example, it is desirable that a pair of feed rollers be employed; such rollers being mounted in adjustable hearings on the pivoted bracket.

It is to be understood also that the present invention is not to be limited to the application of glue to sheets of material, as obviously the machine is readily adaptable to the application of any type of coating, and the terms, glue and gluing or glue applying roller, are intended to cover any kind of coating, and rollers for applying such coating.

While I have illustrated and described a preferred embodiment of my invention, it is to be understood that I do not wish to be limited to this precise embodiment, as obviously various changes and modifications may be made therein without departing from the spirit and scope of the invention.

What I claim is:

1. In a machine of the class described; a support; a glue tank carried by said support; a tank roller positioned in said tank; a bracket pivotally mounted on said support; a gluing roller carried by the bracket and disposed in close proximity to the tank roller to receive glue therefrom; bearings for said gluing roller mounted on u said bracket; bearings for said tank roller mounted on said support; and means for adjustably positioning and for securing said last named bearings in adjusted positions with respect to said support, whereby the tank roller may be adjusted relative to the gluing roller and fixed in adjusted position, said bracket being movable about its pivot away from the tank roller to permit access to the latter roller and its adjustable bearings.

2. In a machine of the class described; a support; a glue tank carried by said support; a tank roller positioned in said tank for receiving glue from the tank; bearings for said tank roller adjustably mounted on said support; a bracket pivotally mounted on said support; a feed roller and a gluing roller; a single unit mounted on each side of the bracket having bearings for said feed roller and gluing roller, the latter roller being disposed in close proximity to the tank roller to receive glue therefrom; means for adjustably positioning said units on said bracket whereby adjustment of said units will effect adjustment of the feed and gluing rollers relative to the tank rollers; and manual means carried by said support at a point remote from the pivotal mounting of the bracket and operable for moving the bracket about its pivot to vary the adjustment between the tank roller and the gluing roller to vary th amount of glue transferred.

3. In a machine of the class described; a support; a glue tank carried by said support; a tank roller positioned in said tank for receiving glue from said tank; bearings for said tank roller mounted on said support; a bracket pivotally mounted on said support; a gluing roller carried by said bracket and disposed in close proximity to the tank roller for receiving glue therefrom; bearings for said gluing roller mounted on said bracket; means for adjustably positioning the gluing roller bearings on the bracket whereby to initially adjust the gluing roller relative to the tank roller; means for securing the gluing roller bearings in their fixed adjusted position; and means connected with the bracket and support for adjusting the bracket about its pivot to vary the initial adjustment between the gluing roller and the tank roller to vary the amount of glue received by the gluing roller.

4. In a machine of the class described; a casing; a support within the casing; a glue containing tank on said support; a tank roller positioned in said tank and adapted to receive glue from said tank; a shaft therefor; bearings for said shaft carried by said support; a gear on each end of said shaft; means for driving one of said gears; a bracket pivotally mounted on said support; a glue applying roller disposed in close proximity to the tank roller for receiving glue from the tank roller; a feed roller; shafts for the glue applying roller and feed roller; a pinion on one end of the shaft of the glue applying roller adapted to mesh .with one of the gears on the tank roller shaft;

bearings for the shafts of the gluing roller and the feed roller carried by said bracket; means for adlusting the tank roller shaft and the glue applying roller shaft relative to each other to bring the said pinion into proper mesh with the gear on the tank roller shaft; and means for adjusting the said pivoted bracket, with the pinion and gear in mesh, to vary the space between the glue applying roller and the tank roller, whereby to vary the amount of glue transferred from the tank roller to the glue applying roller.

5. In a machine of the class described; a casing; a support within the casing; a glue tank carried by said support; a tank roller positioned in said tank; a shaft therefor; bearings for said shaft carried by said support; a gear on each end of said shaft; means for driving one of said gears; a

tr k t-pirot l r un i -s id MPPQ IQ; l e 'rieaj b sa b r ke and i-i -v pj Y e prox1mity, othetahk roller for resee? .1 he fi mi a r ld rb r; sh for sa'idgl'u applying and'feed'rollers; a pinion on one end of the shaft of the glue applying roller 7 a e i0- mes i h one orthe' ars bn t tank roller shaft; bearings carried at. each side of the. bracket for the shafts of the glue applying Q r an d the feed roller; means for adjusting s d tank r lle bearings and aid glue applying gear on the tank roller. shaft; and manually adj dstableresilie'nt meansfconnecting the free end ofthe. bracket to, the support for retaining the pivoted bracket in position to maintain the said ge'a and pinion in meshwith each other.

In a machine of the 'class described; a a suppor i h n t ec s a me k eed'rquerbe -ngs rela i e to ea h g the said pinion into. proper mesh with the e aiiiried by said. support; a tank roller positioned in s id'tank; a shaft, for thertank roller; adjusta' e'bearings for. the shaft carried by said support; a gearloneach end of said shaft; means for driving one of, eaid gears; a bracket pivotally i andthe. fleed roller; means for adjusting the tank I.

rollerl bearings and the gluev applying andieed roller bearings relative: to each other to bring said pinion into proper mesh with the gear on th tank'r'oller; shaft and to bring saidglue applying roller into. proper position relative to the tank roller; resilient, means between the free, end of the pivoted bracket and said support for retaining the bracketin position. tomaintain'the pinion and gear in mesh with, each other, and'to maintain the glue applying roller and the tank roller in. relative operating, positions; manual means for varying the said relative positions of the glue applyingand tank rollers; and adjustable means carried by said bracket and adapted normally to engage said manual; means. a

7. In a machine of the class describedya support; a glue. tank carried by said support; a tank roller positioned in the, tankfor receiving glue o a an bearmse er, a ank r e mo nte 'on sa s pp r a, cke p l y mo n ed. 01. aid uppo a g in r ll ar ed ran b a e and di es d in u t po ition to said roller and adapted to receive glue from the tank roller; a feed roller for feeding: a sheet of material in contact withv the, gluing roller-"1m receive glue therefrom; said feed'and gl n rollers. being carried by said bracket; open hearings said bracketj a shaft, mounted in said bearracket;

& V r 7 its r vet vary the relat ye. vpsitiens of. the ank r le and; hefi h ifne roll r q va. 'theamo t' 0f sl e nsierred; w thq d sturb ng the poi: tion of the stripper members relative tothe gluing rul r 81111 a, machine of the class described, a sup; port, a glu tankfcarriedjon said support, a tank roller mounted on said support and positioned in said tank Qa bracket pivotally. mounted on said 7 support, a'gluing roller mounted on said bracket anddisposedin close proximity to, said tank roller to. receive glue, therefrom, bearings, on said bracket, a shaft mounted on said bearings, a plurality of stripper members carried by said, 7 shaft and normally in engagement with the per ph al r a eqf the. lu n r l r, a weighted member c nn ete'd. w h. each, or said tripp r members and carried by saidvshaift for retaining the a d s ripper members in en a ment with he urf ce f he luin roller, said Weight d membe havi a port on ro ec i the luin rolle whe eby Pr v nt ac t the stripp r me bers r 911, a ma ne at h cl ss e cri e a c ubert; a e tankcarri d by a d s pport, a anfsrq er pcis ti ne v n; s i k f rereiv-- ing. glue Ifroin the tank; a bracket pivotally mounted on said'support; a', gluing roller carried brsa d brack a d dis q ed in c o e proximit to the tank roller to receive glue therefrom; bearin s to aid, gluin "Q1l. r 'c1 n. said cam m a s moun e /in said supp rt or en a emen w th. a' brack ndfm n ly r table me ns assoc ated With said ca 1 operate eaid cam means, whereby to the bracket to move about its pivotal conne twe t9. ej fectadi s me n f the l n roller feleiii e t0; the ta ro le to a y t e amo nt o glue transferred by the latter to; the gluing roller.

l9, Ina, machine of therclasswdescribed; a sup ort; a. lu ta ed y s i s pport: a tank olle positio 6 11, an tank er eceivin gl e r m he a k: a racket pi ota y mounted'on said support; a gluing roller carried by sa d racket nd seased in clo e proximity to he, tan r9 9! tor receiv sl e,t r o bearings 'for' said gluing" roller mounted on said bracket; a sha m unt d, in said s pport at a pa ntei e. fror wt e i o al moun n of the bracket to 'the SL ep rt; cam means carried by said shaft and disposed in operative, relation to aid brack t and. ma ual r ta b means V assoeiatedf with said cam means to operate said U glue transferred by ides; a lu a i y Q trip er me e s arri d said shaft adaptedfto contact the gluing roller;

gravitymeans connected with said stripper them:

hers and carried by' said shaft for, urging the men bers in a direction to contact the gluing roller whereby to strip the sheet of material therefrom; i

said gravity means being adapted toengage said gluing roller to preventdisplaoement of the said shaft 'withrespeet to said bearing; and mann al y erable means co nectedwith the racket and the s pp rt f r ad us ng thefbracket ,abgut i means n en agement with. said b t to cause the bracket'to' move about its pivotal connection to efiect adjustment of the gluing roller relative 'to, the tank roller to Vary the amount of thelatter to the gluing roller; CHAR ES E. SCI-IA EETER.

r r aereseu cnseiran 7 The foll owin g references are of record in the file cf this patent: 1

UNITED STATES PATENTS Numbe Name if a Dat 1322 467 Voli f Sept.18, l931 1,902,264 Rector fl 21, 1933 ace- 472 'Ettl Juner16, 1936 3,053,730 r Minkow f se 't. 8, 193s 2, 9 1 01 H f --.--1-----v Ma '2 19 2,225,457 Langsner a De 17, .940 255,856 5-3 D-QQ- Ree 1. a 

